Hi Tomek,
Welcome to the Forum, there are more knowledgable members of the Forum who would be able to help you out, I purchased a Parachute Brigade Badge back in the 1980's and was burned, it was a fake, I learnt from Kapitan Jan Lorys who I wrote to that all the Parachute Brigade Badges should have 4 numbers so for example 0367.
The badge that you have purchased was from a group of Numbers 0330 to 0500 of badges that were not allocated.
I also learnt the hard way, and never purchased another to this day.
I have just gone through Materialy Zeszyt 9 "Historia Polskiego Znaku Spadochronowego" (History of the Polish Parachute Badge) by Jan Lorys with no luck.
Sorry to be the bearer of bad news.
But hopefully some of the other Forum members might be able to shed some further light on this.
Best wishes
Andrzejku
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